Misty

Misty is a character who premiered in the first episode of the Pokémon anime.

In the first episode, she meets Ash after fishing him out of a lake while he was trying to get away from a flock of Spearow. Ash then takes Misty's bike from her in order to escape the Spearow which is then inadvertently wrecked by Pikachu's Thunder Shock. Misty then tracks down Ash and follows him around on his adventures until he can pay her back, although she eventually forgets about the bike and becomes one of Ash's closest friends in the process. However, at the end of their journey through the Johto Region, Misty's bike has been fully repaired, and she departs to return home to Cerulean City to resume her duties as a Gym Leader.

She's currently the Cerulean City Gym Leader, a position she took over from her older sisters.

Personality
As Misty is the youngest child in her family, she can sympathize with other youngest children like Mikey, Sakura, and Max.

Misty has a slight inferiority complex, mostly due to her three older sisters Daisy (oldest), Violet (second-from-oldest) and Lily (third-from-oldest), who formed the group, "The Three Sensational Sisters" (their synchronized swimming group), and refer to Misty as the "runt" or "weaker one". This complex diminishes over time as Misty grows closer to them. Until Misty resumed her duties as the Cerulean City Gym Leader, her sisters were the ones who directly ran the gym, although when Ash came along to get his Cascade Badge, it was Misty who battled him for it, explicitly referring to herself as being one of the Gym Leaders during this instance.

Misty specializes mainly in Water-type Pokémon, which are her favorite type, but she's had other types, and she also deeply admires Lorelei, an Ice-type Pokémon trainer. Misty aims to become a world-class trainer, and her well-trained Pokémon reflects her aspirations of becoming so. Her least favorite type of Pokémon is Bug-type Pokémon, as she has a deep-rooted fear of them, except for the kinds she sees as “cute” or “pretty”. However, Misty’s fear lessens over the course of the series — but not to the point where she's totally gotten over it, as shown in A Real Cleffa Hanger, SM042: Alola, Kanto! and SM102: Alola, Alola!.

As the series continues, Misty gradually shows herself to be kind and sensible. Sometimes, Misty would restrain Brock from girls, often pulling him away by the ear and reprimanding him for his behavior. This trait continued with the friends who join Ash on his journeys after she parted ways with him, following their journey through the Johto Region.